HOW TO REMOVE THE BIOS CHIP
FROM THE MOTHERBOARD
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Although it seems like a simple task to remove the bios chip from the socket, much can go wrong in this step. First verify that your bios chip is indeed installed in a socket and not soldered directly to your motherboard. Nearly all motherboard manufacturers install their bios chips in sockets, however on rare occasions the chip is soldered directly to the board. If this is the case, your bios cannot be removed and the motherboard must be replaced.

THE BIOS CHIP IS IN A SOCKET
The socket which contains the bios chip holds the chip in place with a strong friction fit. Each pin (leg) of the chip is held by spring leaves, one on each side of each pin. To remove the chip, carefully follow the instructions listed below:

1. Note that the chip has a notch on one end. This notch identifies the orientation of the chip in the socket. Usually the socket also has a notch. When the chip is reinstalled, the notches must align. There may also be an image silk screened directly on the motherboard which shows the notch. DO NOT use the writing on the chip for orientation!

2. You must remove the chip without bending or distorting the pins. Be sure to note the orientation of the chip before it is removed. There is a notch at one end for DIPs and a small dot on one shoulder for PLCCs.

If you have a PLCC (small square bios chip) you may use a PLCC extraction tool. This may be purchased from Radio Shack (276-2101). You can also work the chip up a little at a time with a small flat blade jeweler's screwdriver at the open corners of the socket.

The easiest way to remove a DIP is to insert a small flat blade screw driver or pocket knife under one end of the chip. Very carefully raise, or lever the chip end until it just begins to lift from the socket. Be careful not to have too great an angle. Also be careful as to not press on the motherboard or surrounding components as this may cause damage. After one end of the chip is slightly elevated from the socket, move to the other end and perform the same operation. Move back and forth from end to end until the chip lifts freely from the socket. We recommend Radio Shack part # 276-2101 for both DIPs and PLCC's.

3. If you are successful, the chip pins should remain straight. If you accidentally bend the pins, use small needlenose pliers to straighten the pins to their normal alignment. If needed, you are now ready to determine the manufacturers part number of your bios chip.

4. If you are sending the chip out to be reprogrammed insert the chip in a conductive foam strip to protect it. Foam can be obtained from Radio Shack.

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